Furnace.



W. M. KELLY.

FURNACE.

APPLxcATloN FILED 0150.18. 1915.

Patented June 6, 1916.

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w.l M. KELLY.

FURNACE.

APPLICATION FILED DEC. 18| 1915.

Patented June 6, 1916.

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l l/Il l r/ INVENTOR.

WI T.,VES SES ATTORNEY.

WILLIAM M. KELLY, F NACONDA, MONTANA.

EURNACE.

Specification of Letters Patent.

Patented J une 6, 1916.

Appnation med December 1s, 1915.- serial No. 67,614.

To all ywhom it may concern:

Be it known that I, WILLIAM M. KELLY, a citizen of the United States, residing at Anaconda, in the county of Deel-lodge and State of Montana, have invented certain new and useful Improvements in Furnaces, of which the following is a full,clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention has relation to lmprovements in furnaces; and it consists in the novel features of construction more fully s et forth in the specification and pointed out 1n the claims.

The present invention is directed to metallurgical furnaces generally, and to the reverberatory type in particular, the object sought being to provide a furnace which can be fired at both ends, the structure assuming the form of two reverberatories disposed back to back, a central discharge or waste-gas flue being located at the juncture of the two furnaces. As the furnaces are arranged, their longitudinal axes are coincident, the firing mechanism of one furnace being directly opposite the iiring mechanism of the opposite furnace, the two mechanisms serving to discharge the lire gases or flames into the common chamber of the two combined reverberatories.

The object sought by the present improvement is to conserve the heat of the furnace to the best advantage, the firing devices supplementing one another, the double reverberatory being desirable for special metallurgical operations in cases where the single fired reverberatory will not answer the purpose.

The advantages of the structure will be best apparent from the following detailed description in connection with the accompanying drawings in Which- F ignre, i represents a top plan ofthe double reverberatory, the waste gases being applied to the heating of a battery of steam boilers of the Stirling type; Fig. 2 is a middle vertical longitudinal section of the reverberatory, the boilers being omitted, the firing devices being shown in elevation; and Fig. 3 is a middle vertical cross section through the reverberatory and through the boilers.

Referring to the drawings, F, F, re iesent two reverberatory furnaces disposed aok to l back and in longitudinal aXial alinement whereby a single, double reverberatory results, the same having a single treatment chamber C. The resultlng double reverberatory is fired atopposite ends in any way known to the art, the present illustration contemplating the use of coal dust, pulverized coal or its equivalent. The waste gases discharge into the central, transversely disposed waste flue E spanning the roof of the reverberatory and extending beyond the sides of the furnace, the Hue discharging into the diverging legsl, l, each'y of which conducts the waste gases to the furnace 2 of a Stirling boiler or other steam generator 3, the boiler being shown more or less conventionally.

H, represents the boiler iiue leading to the i stack (not shown).

In the present embodiment of my invention the furnace is fired by coal-dust, a suitable hopper 4 into which the coal dust is dumped, `discharging through short tubes or necks 5 (communicating with `the hopper through the bottom openings 0) into a series of screw-conveyer casings 6 whence the material drops into a chamber 7 traversed vby a current of air under pressure delivered thereto by a pipe 8 branching from the main compressed air pipe 9. |The discharge tube 10 from each air chamber 7 couples to a burner tube li which projects the fuel into the furnace or treatment chamber C. The firing device or fuel feed is shown more or less conventionally and no claim thereto (or kto any equivalent thereof) per se, is herein made. At points where necessary, the flues E and 1, l, are provided with dampers D, manipulated in any manner known to the art, for controlling and regulating the escape of the waste gases and products of combustion, and directing them to the proper boiler or boilers. rlhe matte tap hole fm, is located beneath the flue E, a suitable skimming door Z being provided adjacent the tap hole m along the skimming line t.

Obviously, the furnace may be modified considerably without in any wise aecting the nature or spirit of. my invention. The invention of course need not be restricted in its application to metallurgical furnaces.

It is obvious that conditions may arise where only one of the firing devices may be availed of, the opposite one for the time being, being idle. At other times both ring devices may be in operation but burnin with dierent degrees of intensity; and ally reverberatory furnaces disposed back to back and in longitudinal axial alinement, the same formin a single treatment.v chamber arched 'across t e longitudinal axis of the chamber,

a central transversely disposed Waste flue leading from and spanning said chamber, and means on the longitudinal aXis at each end of the chamber for firing the furnace.

2. A metallurgical furnace comprising two reverberatory furnaces disposed back to back and in longitudinal axial alinement, the same forming a single treatment chamber, a centrally disposed Waste flue leading from. and spanning said. chamber, and means for firing the chamber from both ends of the double furnace.

3. A metallurgical furnace comprising two reverberatory furnaces disposed back to back and in longitudinal axial alinement, the same forming a single treatment chamber, a central transversely disposed Waste or exit flue surmounting and spanning the roof of the furnace and in free communication with the treatment chamber, lmeans for con trolling the discharges of the Waste gases from each end ,of the Waste flue, and firing means at each end of the double furnace.

In testimony whereof I afx my signature, in presence of two Witnesses.

WlLLIAM M. KELLY. 

